SignalHire

SignalHire operates as a global platform for contact discovery and outreach, primarily serving recruiters, sales teams, and marketers. Their database contains real-time verified business and personal emails, phone numbers, and social media profiles for over 850 million people and 30 million companies. The service is often used to enrich lead or candidate profiles by instantly revealing contact details through a browser extension while browsing sites like LinkedIn, Twitter, and Facebook. This extensive collection and exposure of personal contact information, including phone numbers and private emails, create significant privacy risks. Malicious actors could leverage this data for sophisticated phishing scams, identity theft, or targeted harassment and doxxing. To mitigate these risks, individuals should be cautious about the information they share on professional networking sites and can request to opt out of data broker databases like SignalHire.